Estamos tratando de convertir nuestros trabajos Spring-Batch de la configuración XML a la configuración de Java. Estamos utilizando Spring 4.0.1.RELEASE y Spring Batch 2.2.1.RELEASE.

Después de convertir un trabajo, la siguiente advertencia comenzó a aparecer en el archivo de registro:

15-abr-2014 09: 59: 26.335 [Thread-2] WARN o.s.b.f.s.DisposableBeanAdapter - La invocación del método de destrucción 'close' falló en el bean con el nombre 'fileReader': org.springframework.batch.item.ItemStreamException: Error al cerrar el lector de elementos

El stacktrace completo es:

org.springframework.batch.item.ItemStreamException: Error while closing item reader
    at org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader.close(AbstractItemCountingItemStreamItemReader.java:131) ~[spring-batch-infrastructure-2.2.1.RELEASE.jar:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.6.0_25]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) ~[na:1.6.0_25]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) ~[na:1.6.0_25]
    at java.lang.reflect.Method.invoke(Method.java:597) ~[na:1.6.0_25]
    at org.springframework.beans.factory.support.DisposableBeanAdapter.invokeCustomDestroyMethod(DisposableBeanAdapter.java:349) [spring-beans-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:272) [spring-beans-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:540) [spring-beans-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:516) [spring-beans-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:824) [spring-beans-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:485) [spring-beans-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:921) [spring-context-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:895) [spring-context-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:809) [spring-context-4.0.1.RELEASE.jar:4.0.1.RELEASE]
Caused by: java.lang.IllegalStateException: EntityManager is closed
    at org.hibernate.ejb.EntityManagerImpl.close(EntityManagerImpl.java:132) ~[hibernate-entitymanager-4.2.5.Final.jar:4.2.5.Final]
    at sun.reflect.GeneratedMethodAccessor14.invoke(Unknown Source) ~[na:na]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) ~[na:1.6.0_25]
    at java.lang.reflect.Method.invoke(Method.java:597) ~[na:1.6.0_25]
    at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:334) ~[spring-orm-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at $Proxy67.close(Unknown Source) ~[na:na]
    at org.springframework.batch.item.database.JpaPagingItemReader.doClose(JpaPagingItemReader.java:236) ~[spring-batch-infrastructure-2.2.1.RELEASE.jar:na]
    at org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader.close(AbstractItemCountingItemStreamItemReader.java:128) ~[spring-batch-infrastructure-2.2.1.RELEASE.jar:na]
    ... 13 common frames omitted

Este error solo aparece cuando se utiliza la configuración de Java para el trabajo pero no la configuración de XML. El paso configurado con XML se ve así:

<batch:step id="createFile" next="insertFile">
    <batch:tasklet>
        <batch:chunk reader="fileReader" writer="fileWriter"
            commit-interval="#{jobProperties[commit_interval]}" />
    </batch:tasklet>
</batch:step>

<bean id="fileReader"
    class="org.springframework.batch.item.database.JpaPagingItemReader">
    <property name="entityManagerFactory" ref="entityManagerFactory" />
    <property name="queryString"
        value="select mt from MyTable mt where status in ('1','2','3')" />
    <property name="pageSize" value="1000" />
</bean>

La configuración de Java es:

@Bean
public Job fileProcessJob(JobBuilderFactory jobBuilders,
        Step loadConfig,
        Step createFile,
        Step insertFile
        ) {
    return jobBuilders.get(moduleName)
            .start(loadConfig)
            .next(createFile)
            .next(insertFile)
            .build()
            .build();
}

@Bean
public ItemReader<MyTable> cetFileReader(EntityManagerFactory entityManagerFactory) {
    JpaPagingItemReader<MyTable> itemReader = new JpaPagingItemReader<MyTable>();
    itemReader.setEntityManagerFactory(entityManagerFactory);
    itemReader.setQueryString("select mt from MyTable mt where status in ('1','2','3')");
    itemReader.setPageSize(1000);
    return itemReader;
}

¿Por qué aparece esta advertencia en los registros cuando se usa la configuración Java pero no la configuración XML?